https://github.com/datastax/native-protocol: A set of Java types representing the frames and messages of the Apache Cassandra® native protocol, with the associated serialization and deserialization logic (this is a third-party implementation, not related to the Apache Cassandra project)
  • Various (DataStax) 
public class com.datastax.oss.protocol.internal.ProtocolConstants
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: com.datastax.oss.protocol.internal.ProtocolConstants
  super_class: java.lang.Object
{
  public static final java.nio.ByteBuffer UNSET_VALUE;
    descriptor: Ljava/nio/ByteBuffer;
    flags: (0x0019) ACC_PUBLIC, ACC_STATIC, ACC_FINAL

  static void <clinit>();
    descriptor: ()V
    flags: (0x0008) ACC_STATIC
    Code:
      stack=1, locals=0, args_size=0
         0: .line 31
            iconst_0
            invokestatic java.nio.ByteBuffer.allocate:(I)Ljava/nio/ByteBuffer;
            putstatic com.datastax.oss.protocol.internal.ProtocolConstants.UNSET_VALUE:Ljava/nio/ByteBuffer;
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature

  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.datastax.oss.protocol.internal.ProtocolConstants this
         0: .line 22
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // com.datastax.oss.protocol.internal.ProtocolConstants this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/datastax/oss/protocol/internal/ProtocolConstants;
}
SourceFile: "ProtocolConstants.java"
NestMembers:
  com.datastax.oss.protocol.internal.ProtocolConstants$BatchType  com.datastax.oss.protocol.internal.ProtocolConstants$ConsistencyLevel  com.datastax.oss.protocol.internal.ProtocolConstants$DataType  com.datastax.oss.protocol.internal.ProtocolConstants$ErrorCode  com.datastax.oss.protocol.internal.ProtocolConstants$EventType  com.datastax.oss.protocol.internal.ProtocolConstants$FrameFlag  com.datastax.oss.protocol.internal.ProtocolConstants$Opcode  com.datastax.oss.protocol.internal.ProtocolConstants$QueryFlag  com.datastax.oss.protocol.internal.ProtocolConstants$ResultKind  com.datastax.oss.protocol.internal.ProtocolConstants$RowsFlag  com.datastax.oss.protocol.internal.ProtocolConstants$SchemaChangeTarget  com.datastax.oss.protocol.internal.ProtocolConstants$SchemaChangeType  com.datastax.oss.protocol.internal.ProtocolConstants$StatusChangeType  com.datastax.oss.protocol.internal.ProtocolConstants$TopologyChangeType  com.datastax.oss.protocol.internal.ProtocolConstants$Version  com.datastax.oss.protocol.internal.ProtocolConstants$WriteType
InnerClasses:
  public BatchType = com.datastax.oss.protocol.internal.ProtocolConstants$BatchType of com.datastax.oss.protocol.internal.ProtocolConstants
  public ConsistencyLevel = com.datastax.oss.protocol.internal.ProtocolConstants$ConsistencyLevel of com.datastax.oss.protocol.internal.ProtocolConstants
  public DataType = com.datastax.oss.protocol.internal.ProtocolConstants$DataType of com.datastax.oss.protocol.internal.ProtocolConstants
  public ErrorCode = com.datastax.oss.protocol.internal.ProtocolConstants$ErrorCode of com.datastax.oss.protocol.internal.ProtocolConstants
  public EventType = com.datastax.oss.protocol.internal.ProtocolConstants$EventType of com.datastax.oss.protocol.internal.ProtocolConstants
  public FrameFlag = com.datastax.oss.protocol.internal.ProtocolConstants$FrameFlag of com.datastax.oss.protocol.internal.ProtocolConstants
  public Opcode = com.datastax.oss.protocol.internal.ProtocolConstants$Opcode of com.datastax.oss.protocol.internal.ProtocolConstants
  public final QueryFlag = com.datastax.oss.protocol.internal.ProtocolConstants$QueryFlag of com.datastax.oss.protocol.internal.ProtocolConstants
  public ResultKind = com.datastax.oss.protocol.internal.ProtocolConstants$ResultKind of com.datastax.oss.protocol.internal.ProtocolConstants
  public final RowsFlag = com.datastax.oss.protocol.internal.ProtocolConstants$RowsFlag of com.datastax.oss.protocol.internal.ProtocolConstants
  public SchemaChangeTarget = com.datastax.oss.protocol.internal.ProtocolConstants$SchemaChangeTarget of com.datastax.oss.protocol.internal.ProtocolConstants
  public SchemaChangeType = com.datastax.oss.protocol.internal.ProtocolConstants$SchemaChangeType of com.datastax.oss.protocol.internal.ProtocolConstants
  public StatusChangeType = com.datastax.oss.protocol.internal.ProtocolConstants$StatusChangeType of com.datastax.oss.protocol.internal.ProtocolConstants
  public TopologyChangeType = com.datastax.oss.protocol.internal.ProtocolConstants$TopologyChangeType of com.datastax.oss.protocol.internal.ProtocolConstants
  public Version = com.datastax.oss.protocol.internal.ProtocolConstants$Version of com.datastax.oss.protocol.internal.ProtocolConstants
  public WriteType = com.datastax.oss.protocol.internal.ProtocolConstants$WriteType of com.datastax.oss.protocol.internal.ProtocolConstants